1、 MIL-PRF-1/1097J 14 March 2013 SUPERSEDING MIL-PRF-1/1097H 4 October 2006 PERFORMANCE SPECIFICATION SHEET ELECTRON TUBE, RECEIVING TYPE 12AT7WC This specification is approved for use by all Departments and Agencies of the Department of Defense. The requirements for acquiring the product described he
2、rein shall consist of this document and MIL-PRF-1. DESCRIPTION: Twin triode, miniature, high Mu Outline - - - - - 6-2 (EIA) Base - - - - - E9-1 Envelope - - - - - T6-1/2 Cathode - - - - - Coated unipotential Base connections: Pin no. - - - - - 1 2 3 4 5 6 7 8 9 Element - - - - - 2a 2g 2k h h 1a 1g 1
3、k hct ABSOLUTE-MAXIMUM RATINGS: Normal Parameter: Unit: Maximum: Minimum: Ef V 13.9 6.9 11.4 5.7 Eb Vdc 330 - - - Ec Vdc 0, -55 - - - Ehk v 135 - - - Rk/k Ohms - - - - Rg/g Meg 0.25 See note 1 - - Pp/p W 2.7 - - - TE C 165 - - - Alt ft See note 4 - - - Test condition (1): 12.6 250 - - 200 - - - - Pu
4、lse service Parameter: Unit: Maximum: Minimum: Ef V 13.9 6.9 11.4 5.7 Eb Vdc 330 - - - Ec Vdc - - - - eb v 660 - - - egk v 50,-100 - - - Pg/g W 0.1 - - - Du % ik/k ma tp s prr ehk v 100 - - - Pp/p W 2.7 - - - See figure 1 Test condition (2): 12.6 250 -30 - 30 - 1.0 - 10 1,000 - - GENERAL: Qualificat
5、ion - Not required. Reliable tube. This specification sheet uses accept on zero defect sampling in accordance with MIL-PRF-1, table III. AMSC N/A FSC 5960 INCH-POUND This specification sheet is inactive for new design after 13 April 2001 Provided by IHSNot for ResaleNo reproduction or networking per
6、mitted without license from IHS-,-,-MIL-PRF-1/1097J 2 TABLE I. Testing and inspection. MIL-STD-1311 method Requirement or test Conditions Symbol Limits Unit Min Max 1301 1336 1266 1256 1256 1306 1201 Conformance inspection, part 1 Heater current Heater-cathode leakage Total grid current Electrode cu
7、rrent (1) (anode) Electrode current (2) (anode) Transconductance (1) Short and discontinuity detection See note 8 Test condition (1); Rg = 0.5 Meg (see note 3 and note 8) Test condition (1) (see note 8) Test condition (1); Ec = -20 Vdc; Rp = 0.1 Meg; Rk = 0; Ck = 0 (see note 8) Test condition (1) (s
8、ee note 8) If Ihk Ic Ib Ib Sm - 142 - 0 7.0 - 4,500 - 158 7 -0.7 14.0 100 6,500 - mA A dc A dc mA dc A dc mhos - 1211 1256 1256 1306 1266 2201 Conformance inspection, part 2 Insulation of electrodes Electrode current (1) (anode) (difference between sections) Electrode current (3) (anode) Transconduc
9、tance (2) Grid emission Noise and microphonics See note 8 Test condition (1) Test condition (1); Ec = -6.5 Vdc; Rp = 0.1 Meg; Rk/k = 0 (see note 8) Test condition (1); Ef = 11.4 V (see note 8) Ef = 15.0 V; Ec = -20 Vdc; Rg/g = 0.5 Meg Rk = 0; Ck = 0 (see note 7 and note 8) Ebb = 300 Vdc; Ecal = 100
10、mVac; Rk = 200 ohms; Rp = 10,000 ohms; grid grounded (see note 2) R Ib Ib Sm Ef Ic - 500 - 5 - 0 - - 3.2 - 15 -1.5 - Meg mAdc A dc % A dc - See notes at end of table. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1097J 3 TABLE I. Testing
11、and inspection - Continued. MIL-STD-1311 method Requirement or test Conditions Symbol Limits Unit Min Max 1296 1296 1316 1331 1031 1041 1031 - 1031 1336 1306 1266 1121 2126 1105 Conformance inspection, part 2 - Continued Pulse current (1) (cathode) Pulse current (2) (cathode) Amplification factor Di
12、rect-interelectrode capacitance High-frequency vibration Shock Vibration fatigue Post-shock and vibration- fatigue test end points: Low-frequency vibration Heater-cathode leakage Transconductance (1) Total grid current Base strain Envelope strain Permanence of marking Test condition (2); Rk = 1.0 oh
13、m (see note 8 and note 11) Test condition (2); Ef = 11.4 V; Rk = 1.0 ohm (see note 8 and note 11) Test condition (1) (see note 8) No shield No shield No shield, section 1 No shield, section 2 No shield No shield Ec = -3 Vdc; Ebb = 250 Vdc; Rp = 2,000 ohms; Rk = 0; Ck = 0 (see note 2) Test condition
14、(1); 630 G; Ehk = 100 Vdc (see note 9) See note 12 ik ik (tp) - Mu Cgp Cin Cout Cout Cpp Chk Ep - - Ep Ihk Sm Ic - - - 300 - 260 50 1.30 2.00 0.20 0.16 0.15 2.10 - - - - - 3,800 0 - - - - 15 - 70 1.90 3.00 0.70 0.60 0.33 3.50 100 - - 150 20 - -1.5 - - - mA % mA - pF pF pF pF pF pF mVdc - - mVac A dc
15、 mhos A dc - - - See notes at end of table. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1097J 4 TABLE I. Testing and inspection - Continued. MIL-STD-1311 method Requirement or test Conditions Symbol Limits Unit Min Max 1506 - 1336 1516
16、- 1306 1501 - - 1266 1301 1306 1306 1336 1211 - 1501 - - 1296 1511 Conformance inspection, part 3 Heater-cycling life Heater-cycling life-test end point: Heater-cathode leakage Stability life Stability life-test end point: Change in transconduc- tance (1) of individual tubes Intermittent life Interm
17、ittent life-test end points (1,000 hours): Inoperatives Total grid current Heater current Change in transconduc- tance (1) of individual tubes Transconductance (2) Heater-cathode leakage Insulation of electrodes Total defectives Intermittent life (pulse) Intermittent pulse life-test end points (1,00
18、0 hours): Inoperatives Pulse current (1) (cathode) Cathode interface life Ef = 7.5 V; heaters in parallel; Ehk = 135 Vdc Test condition (1); Ehk = 135 Vdc; Rg/g = 0.5 Meg; TA = room Test condition (1); Ehk = 135 Vdc; Rg/g = 0.5 Meg; TE = 165C (min) (see note 5) Test condition (2); Eb = 300 Vdc; Rb/p
19、 = 150 ohms (see note 10) Ef = 6.9 V; heaters in parallel (see note 8) - Ihk - Sm t - - Ic If Sm t Sm Ef Ihk R - - - ik Ri - - - - - - 0 142 - - - 100 - - - 280 - - 15 - 10 - - -0.7 164 25 20 7 - - - - - 50 - Adc - % - - Adc mA % % Adc Meg - - - mA ohms See notes on top of next page. Provided by IHS
20、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1097J 5 NOTES: 1. This value is for operation under fixed-bias conditions. With cathode bias, Rg may be 0.5 Meg maximum. 2. Tie 1k to 2k; 1g to 2g; and 1a to 2a. 3. This test shall be performed at the conclu
21、sion of the holding period. 4. See “Reduced pressure (altitude) rating“, and altitude, maximum peak voltage. 5. Envelope temperature (TE) requirements, when measured in accordance with the temperature by conduction-band measurement (method 1226), will be satisfied if a tube having bogey Ib (5 percen
22、t) under normal test conditions, is determined to operate at or above minimum specified temperature at any position in the life-test rack. 6. This test shall be conducted on the initial lot and thereafter on a lot approximately every 12 months. When one lot has passed, the 12-month rule shall apply.
23、 In the event of lot failure, the lot shall be rejected and the succeeding lots shall be subjected to this test until a lot passes. 7. Prior to this test, tubes shall be preheated a minimum of 5 minutes with all sections operating at the conditions specified below. Test at specified conditions withi
24、n 3 seconds after preheating. The 3-minute test shall not be permitted. Grid emission shall be the last test performed on the sample selected for the grid-emission test. Ef V 15.0 Eb Vdc 250 Ec1 Vdc 0 Rk/k Ohms 200 Rg/g Meg 0.5 8. Test each unit separately. 9. A grid resistor of 0.1 Meg shall be add
25、ed to each section. 10. The positive portion of the grid pulse shall be a rectangular wave meeting pulse shape requirement of method 1296. The pulse shall be applied to the grid by means of a driving circuit which produces the specified peak pulse voltage directly at the grid terminal with respect t
26、o the cathode. Grid resistance not exceeding 50 ohms may be inserted to prevent oscillation, provided readjustment of grid drive is made to maintain the specified pulse amplitude directly at the grid terminal. The pulse width, tp, shall be 10 2 s, and the duty factor, 0.9 percent to 1.1 percent. Sel
27、f-excited life-test circuitry is permissible provided any additional anode voltage drops during the time of the pulse are compensated for by increasing Ebb. No fixed Ec1 need be applied under self-excited conditions. 11. The grid pulse shall be a square wave meeting the pulse shape requirement of me
28、thod 1296, and in addition the maximum amplitude shall occur within the first 20 percent of tp, tp = 10 s, and prr = 1,000 pps. The pulse shall be applied to the grid by means of a driving circuit which produces the specified peak pulse voltage directly at the grid terminal with respect to the posit
29、ive end of the cathode resistor. Grid resistance, not exceeding 50 ohms, may be inserted to prevent oscillation provided readjustment of grid drive is made to maintain the specified pulse amplitude directly at the grid terminal. Peak currents shall be measured by means of a high impedance oscillosco
30、pe, or equivalent device, connected across a cathode resistor of 1.0 0.01 ohm. The specified limit refers to the maximum of the pulse amplitude. The variation of the output pulse amplitude between 20 and 80 percent tp shall not exceed the specified limits for ik(tp). 12. Acceptance sampling procedur
31、e shall be in accordance with “Base-strain test, miniature, sampling (method 1121), except that data covered in “Acceptance and rejection criteria“ shall be modified as follows: a. Accepted if no defectives for class “A“, “B“, or “C“ defects, respectively (see method 112). b. Rejected if any defecti
32、ves for “A“, “B“, or “C“ defects, respectively. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1097J 6 NOTE: The area below and to the left of the line is the area of permissible operation. Three hundred milliamperes is the maximum peak cu
33、rrent at any duty factor less than 1 percent. For any tube operating under the worst probable conditions, the point indicating peak cathode current and percent duty factor and the point indicating peak cathode current and pulse width should both be in the area of permissible operation. Duty factor i
34、s defined as the ratio of the average current to the maximum peak current occurring in any 1,000-microsecond period. FIGURE 1. Pulse rating chart for tube type 12AT7WC. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-1/1097J 7 NOTE: Reference
35、d documents. In addition to MIL-PRF-1, this specification sheet references the following document: MIL-STD-1311. The margins of this specification are marked with vertical lines to indicate where changes from the previous issue were made. This was done as a convenience only and the Government assume
36、s no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are cautioned to evaluate the requirements of this document based on the entire content irrespective of the marginal notations and relationship to the last previous issue. Custodians: Preparing activity: Army
37、- CR DLA - CC Navy - EC Air Force - 85 (Project 5960-2013-005) DLA - CC Review activities: Army - AR, AV, MI Navy - AS, CG, MC, OS, SH Air Force - 71, 99 NOTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at https:/assist.dla.mil/. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
